APA (7e ed.) Bronvermelding

Não informado. (1971). IDS Communication. University of Sussex, Institute of Development Studies.

Chicago (17e ed.) Bronvermelding

Não informado. IDS Communication. Brighton, Inglaterra: University of Sussex, Institute of Development Studies, 1971.

MLA (8e ed.) Bronvermelding

Não informado. IDS Communication. University of Sussex, Institute of Development Studies, 1971.

Let op: Deze citaties zijn niet altijd 100% accuraat.